Hi..Love your thread...Great post....Very nice work. I too have a 125 gallon tank..Old Petco model. As soon as I finish my first build (currently doing a 90 gallon) I am going to sorta "re-do" if you will, the tank. I currently house some Central and South American cichlids. Convicts, silver dollars, a Jag, a Texas, pictus cat, a pleco, a jewel, a jack dempsey, and recently purchased a small RTC, which I KNOW I'm gonna have to build another tank for !! They get huge of course. Anyway, I am inspired about your DIY background. I have been afraid to tackle that. But with your idea of doing a model first, I think I can try it. A few questions. Where did you get your material (poly stuff or styrofoam??)? And what do you cut it with?